Browsing by Subject "Plant sciences"

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    Genetic variation among 481 diverse soybean accessions, inferred from genomic re-sequencing
    (Springer Nature, 2021-02-08) Valliyodan, Babu; Brown, Anne V.; Wang, Juexin; Patil, Gunvant; Liu, Yang; Otyama, Paul I.; Nelson, Rex T.; Vuong, Tri; Song, Qijian; Musket, Theresa A.; Wagner, Ruth; Marri, Pradeep; Reddy, Sam; Sessions, Allen; Wu, Xiaolei; Grant, David; Bayer, Philipp E.; Roorkiwal, Manish; Varshney, Rajeev K.; Liu, Xin; Edwards, David; Xu, Dong; Joshi, Trupti; Cannon, Steven B.; Nguyen, Henry T .; Biomedical Engineering and Informatics, Luddy School of Informatics, Computing, and Engineering
    We report characteristics of soybean genetic diversity and structure from the resequencing of 481 diverse soybean accessions, comprising 52 wild (Glycine soja) selections and 429 cultivated (Glycine max) varieties (landraces and elites). This data was used to identify 7.8 million SNPs, to predict SNP effects relative to genic regions, and to identify the genetic structure, relationships, and linkage disequilibrium. We found evidence of distinct, mostly independent selection of lineages by particular geographic location. Among cultivated varieties, we identified numerous highly conserved regions, suggesting selection during domestication. Comparisons of these accessions against the whole U.S. germplasm genotyped with the SoySNP50K iSelect BeadChip revealed that over 95% of the re-sequenced accessions have a high similarity to their SoySNP50K counterparts. Probable errors in seed source or genotype tracking were also identified in approximately 5% of the accessions.
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    Nature-Guided Synthesis of Advanced Bio-Lubricants
    (Springer Nature, 2019-08-12) Romsdahl, Trevor; Shirani, Asghar; Minto, Robert E.; Zhang, Chunyu; Cahoon, Edgar B.; Chapman, Kent D.; Berman, Diana; Chemistry and Chemical Biology, School of Science
    Design of environmentally friendly lubricants derived from renewable resources is highly desirable for many practical applications. Here, Orychophragmus violaceus (Ov) seed oil is found to have superior lubrication properties, and this is based on the unusual structural features of the major lipid species-triacylglycerol (TAG) estolides. Ov TAG estolides contain two non-hydroxylated, glycerol-bound fatty acids (FAs) and one dihydroxylated FA with an estolide branch. Estolide branch chains vary in composition and length, leading to their thermal stability and functional properties. Using this concept, nature-guided estolides of castor oil were synthesized. As predicted, they showed improved lubrication properties similar to Ov seed oil. Our results demonstrate a structure-based design of novel lubricants inspired by natural materials.